text: #ifndef _LINUX_SCHED_NUMA_BALANCING_H
  #define _LINUX_SCHED_NUMA_BALANCING_H
  
  /*
   * This is the interface between the scheduler and the MM that
   * implements memory access pattern based NUMA-balancing:
   */
  
  #include <linux/sched.h>
  
  #define TNF_MIGRATED	0x01
  #define TNF_NO_GROUP	0x02
  #define TNF_SHARED	0x04
  #define TNF_FAULT_LOCAL	0x08
  #define TNF_MIGRATE_FAIL 0x10
  
  #ifdef CONFIG_NUMA_BALANCING
  extern void task_numa_fault(int last_node, int node, int pages, int flags);
  extern pid_t task_numa_group_id(struct task_struct *p);
  extern void set_numabalancing_state(bool enabled);
  extern void task_numa_free(struct task_struct *p);
  extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
  					int src_nid, int dst_cpu);
  #else
  static inline void task_numa_fault(int last_node, int node, int pages,
  				   int flags)
  {
  }
  static inline pid_t task_numa_group_id(struct task_struct *p)
  {
  	return 0;
  }
  static inline void set_numabalancing_state(bool enabled)
  {
  }
  static inline void task_numa_free(struct task_struct *p)
  {
  }
  static inline bool should_numa_migrate_memory(struct task_struct *p,
  				struct page *page, int src_nid, int dst_cpu)
  {
  	return true;
  }
  #endif
  
  #endif /* _LINUX_SCHED_NUMA_BALANCING_H */
  